Abstract：
:Benzodiazepines (BDZs) are GABA(A) receptor modulators with anxiolytic, hypnotic, and anticonvulsant properties. BDZs are understood to potentiate GABA(A) receptor function by increasing channel opening frequency, in contrast to barbiturates, which increase channel open duration. However, the in vitro evidence demonstrating increased opening frequency involved prolonged exposure to sub-saturating GABA concentrations, conditions most similar to those found in extrasynaptic areas. In contrast, synaptic GABA(A) receptors are transiently activated by high GABA concentrations. To determine if BDZ modulation of single-channel opening frequency would be different for BDZ-sensitive receptors activated under synaptic versus extrasynaptic conditions, a combination of patch clamp recording and kinetic modeling was used. Consistent with the original experimental findings, BDZs were found to increase receptor affinity for GABA by decreasing the unbinding rate. While this mechanism was predicted to increase opening frequency under extrasynaptic conditions, simulations predicted that the same mechanism under synaptic conditions would increase the number, but not the frequency, of single-channel openings. Thus, a single mechanism (slower GABA unbinding) can produce differential changes in opening frequency under synaptic versus extrasynaptic conditions. The functional impact of BDZs on GABA(A) receptors therefore depends upon the physiological context of receptor activation.
journal_name
Epilepsy Resjournal_title
Epilepsy researchauthors
Bianchi MT,Botzolakis EJ,Lagrange AH,Macdonald RLdoi
10.1016/j.eplepsyres.2009.03.007subject
Has Abstractpub_date
2009-08-01 00:00:00pages
212-20issue
2-3eissn
0920-1211issn
1872-6844pii
S0920-1211(09)00076-Xjournal_volume
85pub_type
杂志文章abstract：:The inbred Wistar Albino Glaxo Rats from Rijswijk (WAG/Rij) and the Genetic Absence Epilepsy Rats from Strasbourg (GAERS) are well-validated genetic models of absence epilepsy. Although they share similar characteristics including the spike-and-wave discharges (SWDs) in the EEG, some differences have been reported bet...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.12.005
更新日期：2010-05-01 00:00:00
abstract：:A battery of psychometric tests was administered to 110 patients with epilepsy and to 24 non-epileptic controls. Eighty-four patients had been established on treatment with a single anticonvulsant drug (35 carbamazepine (CBZ), 30 sodium valproate (VPA), 19 phenytoin (PHT)) at unaltered dosage for the previous 3 months...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(90)90018-q
更新日期：1990-12-01 00:00:00
abstract：PURPOSE:We investigated long term prognosis of Lennox-Gastaut syndrome (LGS) with active application of recent advanced treatment modalities such as ketogenic diet (KD) or epilepsy surgery (ES). METHODS:We retrospectively evaluated 68 patients with LGS, aged 18-35 years. We assessed seizure outcomes for a range of the...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2014.11.004
更新日期：2015-02-01 00:00:00
abstract：:Changes in EEG synchronization, i.e., spatio-temporal correlation, with amygdala-hippocampal stimulation were studied in patients with temporal lobe epilepsy. Synchronization was evaluated for high frequency, 130 Hz, pseudo-monophasic or biphasic charge-balanced pulses. Desynchronization was most frequently induced by...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2013.11.024
更新日期：2014-02-01 00:00:00
abstract：:Uncomplicated childhood-onset epilepsy is associated with increased brain amyloid load at late middle age, but its possible association with Alzheimer-type neurodegenerative processes is unclear. After 50-year follow-up, 42 childhood onset epilepsy subjects and 45 matched controls were investigated with [18F]fluorodeo...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2017.09.006
更新日期：2017-11-01 00:00:00
abstract：OBJECTIVE:Despite increasing amounts of research on periodic discharges (PDs), large clinical studies regarding their prognostic value are lacking. The aim of the current study was to evaluate the clinical implications and prognostic value of PDs. METHODS:In this single-center retrospective cohort study, we included p...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2017.02.004
更新日期：2017-03-01 00:00:00
abstract：BACKGROUND:High frequency oscillations (HFOs) have provided a new insight in understanding ictogenesis and seizure localization. In absence seizures, HFOs were predominantly localized in the medial prefrontal cortex (MPFC) in MEG studies. METHODS:We studied HFOs (80-250 Hz) in scalp EEGs in patients with absence epile...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2015.06.008
更新日期：2015-09-01 00:00:00
abstract：:The aim of the present study was to evaluate the risk of intrauterine growth delay in the offspring of epileptic mothers and to quantify the risks of intrauterine exposure to antiepileptic drugs (AEDs). Data concerning 870 newborns, prospectively collected in Canada, Japan and Italy, using the same study design, were ...
journal_title：Epilepsy research
pub_type： 杂志文章,多中心研究
doi：10.1016/s0920-1211(99)00020-0
更新日期：1999-08-01 00:00:00
abstract：:Benign myoclonic epilepsy in infancy is a rare syndrome with just over 100 cases reported since the first syndromic description by Dravet and Bureau [Dravet, C., Bureau, M., 1981. The benign myoclonic epilepsy of infancy. Rev. Elecroencephalogr. Neurophysiol. Clin. 11, 438-444]. This includes 23 infants with reflex my...
journal_title：Epilepsy research
pub_type： 杂志文章,评审
doi：10.1016/j.eplepsyres.2006.01.014
更新日期：2006-08-01 00:00:00
abstract：:The genetically epilepsy-prone rat (GEPR) has become an important model to study genetic predisposition to epilepsy involving not only the brainstem but also forebrain structures. Previous work in CA1 hippocampal cells showed a reduction in spike frequency adaptation and only subtle changes in slow afterhyperpolarizat...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(95)00040-2
更新日期：1995-10-01 00:00:00
abstract：:A single-dose study of the beta-carboline, ZK 95962, on photosensitive generalized paroxysmal activity in the EEG was conducted in 6 patients with primary generalized epilepsy. Four of the patients were newly diagnosed and did not receive any antiepileptic drug or other medication during the study. Two were receiving ...
journal_title：Epilepsy research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/0920-1211(90)90032-q
更新日期：1990-03-01 00:00:00
abstract：SUMMARY:Autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE) is known to be partly caused by mutations in the transmembrane domain (TM) 1-3 of the genes of the neuronal nicotinic acetylcholine receptor (nAChR) alpha4-subunit (CHRNA4), beta2-subunit (CHRNB2) and alpha2-subunit (CHRNA2). The more common cases of s...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2008.10.009
更新日期：2009-02-01 00:00:00
abstract：PURPOSE:To study the extent and characteristics of dietary and herbal supplements use in a large cohort of adult patients with epilepsy. METHODS:This prospective study included 490 patients receiving care at a university epilepsy clinic. A number of variables, including demographics, characteristics of epilepsy and it...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2019.106168
更新日期：2019-10-01 00:00:00
abstract：:Seletracetam (SEL), an analog of the antiepileptic drug levetiracetam (LEV), decreases seizure activity in a number of epilepsy models and binds to the synaptic vesicle protein SV2A with a higher affinity than LEV. Experiments were performed to determine if SEL, like LEV, reduces the later EPSPs in long trains of stim...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2015.08.006
更新日期：2015-11-01 00:00:00
abstract：:Pregabalin (PGB) is a new antiepileptic drug (AED) which is a structural, non-functional analogue of gamma-aminobutyric acid. It acts at presynaptic calcium channels to modulate neurotransmitter release in the CNS. While the efficacy and tolerability of PGB have been demonstrated in several randomised controlled trial...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.08.001
更新日期：2009-12-01 00:00:00
abstract：PURPOSE:Hippocampal sclerosis (HS) is the most common pathology in mesial temporal lobe epilepsy (MTLE). There are a few reports concerning prognosis in patients with MTLE-HS treated medically. The study was carried out to determine the clinical risk factors affecting prognosis. METHODS:We enrolled 287 patients with M...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.03.001
更新日期：2009-08-01 00:00:00
abstract：:The antidepressant drug fluoxetine (FLX) has been shown to exert antiepileptic effects in several animal models, but mixed preclinical findings and occasional reports of proconvulsant effects have led to hesitation towards its use in epileptic people. Despite being developed as a selective serotonin reuptake inhibitor...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2012.03.019
更新日期：2012-08-01 00:00:00
abstract：:It has previously been suggested that abnormalities in cardiac repolarization (QTc lengthening and shortening) are more likely to accompany seizures with hypoxemia and may be involved in sudden unexpected death in epilepsy (SUDEP). Accordingly, we evaluated for associations between peri-ictal QTc changes and hypoxemia...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2014.03.016
更新日期：2014-07-01 00:00:00
abstract：OBJECTIVE:In Rasmussen syndrome (RS), in addition to the predominant involvement of cytotoxic T cells, heterogeneous autoantibodies against neural molecules are also found, but their function has not been elucidated. We examined antibodies to N-methyl-d-aspartate (NMDA) type glutamate receptor (GluR) subunits (GluN2B &...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2015.03.004
更新日期：2015-07-01 00:00:00
abstract：:An intravenous formulation of carbamazepine (CBZ) was administered to 113 (60 male; 53 female) persons with epilepsy aged 19-87 years. Subjects received 100mg of study drug as replacement for 100mg of their usual morning dose of CBZ. There were no significant changes in blood pressure or heart rate suggesting that thi...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.01.013
更新日期：2009-04-01 00:00:00
abstract：PURPOSE:Ictal magenetoencephalographic (MEG) discharges convey significant information about ictal onset and propagation, but there is no established method for analyzing ictal MEG. This study sought to clarify the usefulness of time-frequency analyses using short-time Fourier transform (STFT) for ictal onset and propa...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2010.05.001
更新日期：2010-08-01 00:00:00
abstract：:The severe seizure genetically epilepsy-prone rat (GEPR-9) is characterized by a broad-based seizure predisposition and is increasingly recognized as a useful model of epilepsy. When sound stimulated, members of the GEPR-9 colony exhibit complete tonic extensor convulsions. Female GEPR-9s appear to experience a higher...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(88)90039-3
更新日期：1988-09-01 00:00:00
abstract：:Increased prevalence of autoantibodies has been suggested in patients with epilepsy. This study determined the presence of autoantibodies in a representative cohort of 960 patients with epilepsy. The frequency of antinuclear antibodies (ANA), immunoglobulin G class anticardiolipin antibodies (aCL) and anti-B2-glycopro...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2003.12.004
更新日期：2004-01-01 00:00:00
abstract：:Recent years have witnessed an increased interest from pediatric neurologists, neuropediatricians, epileptologists and general neurologists in the use of the ketogenic diet (KD) for the management of refractory epilepsies, particularly in children and adolescents. This article summarizes current knowledge on various i...
journal_title：Epilepsy research
pub_type： 共识发展会议,杂志文章
doi：10.1016/j.eplepsyres.2005.10.003
更新日期：2006-02-01 00:00:00
abstract：:We describe the clinical and radiological features of a family with a homozygous mutation in TBC1D24. The phenotype comprised onset of focal seizures at 2 months with prominent eye-blinking, facial and limb jerking with an oral sensory aura. These were controllable with medication but persisted into adult life. Associ...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2013.02.005
更新日期：2013-07-01 00:00:00
abstract：:Freeze-lesion-induced focal cortical dysplasia in rats closely resembles human microgyria, a neuronal migration disorder associated with drug-resistant epilepsy. Alterations in expression of N-methyl-D-aspartate receptors (NMDARs) containing NR2B subunits have been suggested to play a role in the hyperexcitability see...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2006.07.013
更新日期：2006-12-01 00:00:00
abstract：:Several interacting genetic factors are likely to be involved in the epileptogenesis of idiopathic generalized epilepsies (IGE). Neurotransmitter transporters play a central role in the fine tuning of neurotransmission by removal of released neurotransmitters from the synaptic cleft. The present association study test...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/s0920-1211(00)00120-0
更新日期：2000-08-01 00:00:00
abstract：OBJECTIVE:Aphasic status epilepticus (ASE), although rare, may often remain underdiagnosed. We aimed to report the patients diagnosed with ASE and describe their clinical presentation, etiology, electrophysiological findings, neuroimaging, treatment options, and outcome. METHODS:We retrospectively analyzed a series of...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2020.106479
更新日期：2020-11-01 00:00:00
abstract：:Children with refractory epilepsy who are co-treated with the ketogenic diet (KD) and carbonic anhydrase inhibitor (CA-I) anti-epileptic medications including topiramate (TPM) and zonisamide (ZNS) are at risk for urolithiasis. Retrospective chart review of all children treated with ketogenic therapy at our institution...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2010.04.005
更新日期：2010-06-01 00:00:00
abstract：BACKGROUND:Asymmetry of hippocampal internal architecture (HIA) clarity has been suggested to be a sign of hippocampal sclerosis (HS) and is frequently associated with other MRI findings of HS. The goal of this work is to use a previously developed HIA visual scoring system (Ver Hoef et al., 2013) to quantify HIA asymm...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2013.05.008
更新日期：2013-09-01 00:00:00
